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Application Note

Embedded Pentium® Processor-Based POS Terminal Sample Design

1.0	Introduction.........................................................................................................................				7
	1.1	Key Terms .............................................................................................................			7
	1.2	Related Documents...............................................................................................			7
2.0	Embedded Applications Overview......................................................................................				8
	2.1	Influence of PC Technology ..................................................................................			8
	2.2	Embedded Pentium Processors............................................................................			8
	2.3	Operating Systems for POS Applications..............................................................			9
3.0	Point-of-Sale Terminal........................................................................................................				9
	3.1	Proprietary Operating System Versus Off-the-Shelf .............................................			9
	3.2	POS Implementation ...........................................................................................			10
	3.3	Windows CE........................................................................................................			11
4.0	Embedded Pentium Processors.......................................................................................				11
	4.1	Pentium Processor with MMX Technology..........................................................			14
5.0	POS Terminal Design Overview.......................................................................................				15
	5.1	Core Components ...............................................................................................			15
	5.2	Processor Assembly Components ......................................................................			16
6.0	Functional Description of Hardware .................................................................................				16
	6.1	Processor Assembly............................................................................................			17
		6.1.1	Processor ...............................................................................................		17
		6.1.2	In-Target Probe (ITP) .............................................................................		17
		6.1.3	Voltage Regulator...................................................................................		17
		6.1.4	Intel 430TX PCIset .................................................................................		17
			6.1.4.1 82439TX System Controller (MTXC).........................................		17
			6.1.4.2	Intel 82371AB PCI ISA IDE Xcelerator (PIIX4) .........................	18
			6.1.4.3	IDE / Floppy...............................................................................	19
			6.1.4.4	USB Host Controller ..................................................................	19
		6.1.5	Cache .....................................................................................................		21
	6.2	Video ...................................................................................................................			22

6.2.1Chips and Technologies 69000 HiQVideo Accelerator with Integrated Memory22

	6.2.2 High Performance Integrated Memory ...................................................		22
	6.2.3	HiQColor Technology .............................................................................	22
	6.2.4	Versatile Panel Support ..........................................................................	22
	6.2.5 Television NTSC/PAL Flicker Free Output.............................................		23
		6.2.5.1 Design Note ...............................................................................	23
6.3	Audio	...................................................................................................................	26
	6.3.1	AC ’97 Audio ..........................................................................................	26
	6.3.2 ....................................Ensoniq AudioPCI 97 ES1371 Digital Controller		27
	...............................................................................	6.3.2.1 Design Note	27
	6.3.3 ...............................Analog Devices AC ’97 AD1819 SoundPort Codec		27
	...............................................................................	6.3.3.1 Design Note	27
6.4	SMSC ...............................................................................FDC37B78x Ultra I/O		29

Application Note

iii

Embedded Pentium® Processor-Based POS Terminal Sample Design
		6.4.1 Floppy Disk Controller (FDC) .................................................................			29
		6.4.2	Serial Port Controller..............................................................................		29
		6.4.3	Infrared Interface....................................................................................		29
			6.4.3.1 Design Note...............................................................................		29
		6.4.4	Parallel Port Controller ...........................................................................		30
		6.4.5	Keyboard and Mouse .............................................................................		30
			6.4.5.1	Design Note for Ultra I/O ...........................................................	30
		6.4.6 Additional Serial Ports with SMSC 37C669 Super I/O ...........................			31
			6.4.6.1 Design Note...............................................................................		31
	6.5	Tritech Microelectronics TR88L803 Touch Screen
		Controller.............................................................................................................			32
		6.5.1	Design Note ...........................................................................................		32
	6.6	PCMCIA (Strataflash & PC Card) Socket ...........................................................			33
		6.6.1 Texas Instruments PCI1221 PC Card (PCMCIA) Controller ..................			33
			6.6.1.1 Slot A: PCMCIA Socket with Texas Instruments TPS2206
				PC Card Power-Interface Switch with Reset.............................	33
			6.6.1.2	Slot B: Intel StrataFlash Memory...............................................	33
			6.6.1.3 Design Note...............................................................................		34
	6.7	ISA PCI Expansion Cards ...................................................................................			35
		6.7.1	Design Note ...........................................................................................		35
	6.8	Clocking ..............................................................................................................			36
		6.8.1	Cypress Semiconductor CY2280 ...........................................................		36
		6.8.2	Cypress Semiconductor CY2309 ...........................................................		36
		6.8.3 Clocking for 430TX Chipset ...................................................................			36
		6.8.4 Clocking for 440BX Chipset ...................................................................			37
7.0	Design Considerations .....................................................................................................				37
8.0	Windows CE.....................................................................................................................				38
	8.1	Windows CE for Embedded Applications............................................................			39
	8.2	Windows CE Environment ..................................................................................			39
		8.2.1	Kernel.....................................................................................................		39
		8.2.2	Modularity...............................................................................................		39
		8.2.3 OEM Adaptation Layer (OAL) ................................................................			40
	8.3	Windows CE Build Information............................................................................			40
		8.3.1	Getting Started .......................................................................................		40
		8.3.2 Building a Windows CE Operating System Configuration......................			40
		8.3.3 Building a New Project ...........................................................................			41
			8.3.3.1	Create a New Platform Directory...............................................	41
			8.3.3.2	Create a New Project Directory.................................................	41
			8.3.3.3 Create a New Command Prompt Build Window .......................		42
			8.3.3.4 Build the Windows CE Operating System Image for a
				New Project ...............................................................................	42
			8.3.3.5	Adding Files or Applications to the Windows CE Operating
				System Image ...........................................................................	42
9.0	Windows CE Device Drivers ............................................................................................				43
	9.1	Dynamic Link Libraries (DLLs) ............................................................................			43
	9.2	Windows CE Device Driver Model ......................................................................			43
	9.3	Interaction with Application Software ..................................................................			44
	9.4	Incorporating Device Drivers...............................................................................			44
		9.4.1 NE2000 ISA Network Interface Cards (NIC) ..........................................			45

iv	Application Note

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Contents